Attaching Draft Inducer Assembly - Space-Ray LTU SERIES Installation And Operation Instructions Manual

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ATTACHING DRAFT INDUCER ASSEMBLY

1. Attach the draft inducer assembly and gasket to end of tube flange and secure with 1/4-20 locknuts. A flue restrictor
plate is attached to the draft inducer weld studs. Make sure this remains in place while the draft inducer is being
attached to the heater body. NOTE: The draft inducer can be mounted in a vertical, a 45º, or a horizontal position. Refer
to the diagram on Multiple Hanging and Draft Inducer Positions (Section 15.1).
2. Disconnect the piece of SJO cable (if equipped) from the junction box and discard. This is used only on LTU series
heaters.
3. The 3/8" connector used to hold the SJO cable will remain to provide strain relief for field wiring of the control box and
the draft inducer (refer to the Electrical Connections and Connection Wiring Diagram for wiring between the control box
and the draft inducer in Section 18).
4. If the heater is to be VENTED to the outside of the building, place the starting collar on the outlet of the draft inducer and
secure with the #8-32 screws and nuts. Place the flue pipe directly onto the starting collar, secure with the #8 sheet
metal screws, and terminate with an approved vent cap.
5. If the heater is for UNVENTED use, place the exhaust hood (supplied as an accessory) directly onto the outlet of the draft
inducer (starting collar is not necessary for unvented use). Secure with the #8 sheet metal screws. The exhaust hood
must be mounted only in an upright position and directed toward the reflector body.
6. Assemble the end reflector flush with the end of the main body reflector. Secure by sliding speed clips onto the reflector
edges. Evenly space the speed clips on the sides (one each side) and top (two required) of the reflectors to provide a
snug fit. Leave a 3" space between the end reflector and the draft inducer assembly.
Form #43155260
Mar–05 –25–